Anil Aramco Ans

1 Describe steps for externally coated pipelines?
Ans: Equipment inspection,material inspection,weather condition,Blasting inspection,coating activities

2 Where can you find recoat interval of successive coating ?
Ans: MDS or Aramco standard SAES-H-101V
3 One set of Blasting & Coating shop assembled in an Industrial area separate details provide the requirements of air
compressor capacity as per dep activity basis?
Ans: compressor capacity - 600 CFM,100-120 psi(Air compressor to After cooler ., After cooler to Air reciver 250 Psi, Air
reciver to Blasting pot/Air less pump 5000 psi/Power stirrer 5 letter /Air Filtter/Co monitor, Blasting pot to Dead man
switch/ nozzle 6" width 3/8 or 9mm/ grounding wire AWG-4)
4 After Abrasive blasting what is the maximum limit for residual chloride for internal & external ?
Ans: Internal-20mg/m2
External-40mg/m2
5 What is Holiday?
Ans: Discontinuety on Coated surface
6 What is the minimum nozzle pressure acceptable for blasting steel & What is the device use for measuring the
pressure?
Ans: 90psi,Hypodermic needle pressure Gauge
7 Can APCS-1B can be used over APCS -1C?
Ans: No
8 What is Saudi Aramco specification for the safety?
Ans: SAES-H-102
9 In Contractor storage area if you observe coating materials have exceeded their shelf life . What will the action &
justify?
Ans: To move Quarantained area,Should not used expaired paint.
10 What is APCS 113C?
Ans: Visco Elastic Coating
11 what is the difference between pot life and Induction time?
Ans: Pot life is the period of after mixing in which paint should be used,Induction period is the length of time after mixing in
which paint should stand before use .
12 How the quality of compressor air can be determined & Explain briefly?
Ans: To conducted Blotter test, Use 50psi air, 45-60cm nozzle distance ,1minute
13 When is performed holiday inspection either after coating completed or before backfilling for APCS 113C?
Ans: Before backfilling
14 How to find repair of APCS-113C in pipe line?
Ans: To conducted Holiday test
15 What is tip size recommended for APCS-1D primer ?
Ans: Tip size 0.019 to 0.025 inches
16 What is the time interval for the Abrasive surface tobe primed or coated before the surface condition degrades below
the specitied cleanliness level?
Ans: With in 4 Hours
17 How to ensure the repair area acceptance in APCS-113C?
Ans: After repair again perform holiday test
18 APCS Stands for?
Ans: Approved Protective Coating System
19 What is the maximum size of roller can be used for repair and touch up area?
Ans: can't use roller
20 What is meaning of recoat interval?
Ans: Time between one coat to another coat
21 During painting material receiving inspection, signs of leakage were observed on the sealed containers. What would be
your action?
Ans: Reject that leaked container and remove from the paint store.
22 If the substrate temperature is greater than 3°C (5°F) above the dew point,Can be blasting and Coating activities can be
carried out?
Ans: Yes
23 What is difference between transition section and open cut excavation?
Ans: Transition section is pipeline changes from buried condition to above ground condition and Open cut excavation is
excavating down to and exposing the existing pipe
24 Which APCS to use for coating under fire proofing?
Ans: APCS-1B
25
Actually, required profile 45 microns.But ,Available 75 micron,after blasted . How will get the required 45 microns?
Ans: Sweep blasting with 45° Angle
26 Primer application completed using HEMPEL Manufacture. HEMPEL Manufacture is not available in market for
succeding application for intermediate and final coat.What you will do?
Ans: Will contact with Manufacture to get Approval from CSD.(Consulating Service Department)
27 Which buried pipeline is externaly shallbe coated Eiter carbon steel or stainless?
Ans: Both are shall be coated
28 Wahat is the maximum operating pressure for hoses,pumps, and accessories?
Ans: 5000 Psi
29 How to monitor air purity for the abrasive blaster during blasting activites?
Ans: CO Moniter
30 When is performed holiday inspection either after coating fully cured or before backfilling?
Ans: Before backfilling
31 What is pot life for APCS-10?
Ans: No pot life
32 Where is right place for mixing of coating consumables?
Ans: Mixing area or mixing shelter
33 What is dead man handle?
Ans: Safety device for Blaster
34 Abrasive blasted steel left uncoated due to weather condition Next day plan to start coating application How you decide
for coating application on the blasted steel?
Ans: After sweep blasting can continue the coating activities
35 What is hose size can be used from air compressor to blast nozzle out of abrasive?
Ans: 3 times the size of the nozzle orifice
36 Where can you find blast profile requerment size of minimum and maximum?
Ans: SAES-H-101,Manufactuer data sheet ,Aramco standard
37 How many spray patterns are approved for coating application in saudi Aramco?
Ans: Conventional spray, Air less spray,Thermal Sprayed Aluminium
38 How to measure film thickness of WFTand DFT?
Ans: WFT-Comb guage,DFT- Elcometer
39 Discribe of your responsibilities, while you are working in site and coating shop?
Ans: Directly supervise and coordinate the activites of production and operating workers.
40 What is the Adhesion test?
Ans: Adhesion is the force required to separate two surface in touch. CASTM -D6677

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1 Describe steps for externally coated pipelines?

Ans: Equipment inspection,material inspection,weather condition,Blasting inspection,coating activities

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